Heat-A/C blower
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Cross-Country
Joined: Jan 2008
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Heat-A/C blower
Out of the blue the fan will only run on the highest setting. I have both steering and dash controls so I don't think it's something inside the cab. I lowered the temp control to 60 and it didn't make any difference. Thanks
Lead Driver
Joined: Sep 2007
Posts: 8,180
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From: Scio, OR
Try this procedure and see if it comes up with any codes. If it does I can probably look them up and point you in the right direction. It might be the speed controller, but I don't think I've seen an EATC do this. It's usually the manual controls when the resisters fail.
https://www.ford-trucks.com/forums/1...l#post11347861
https://www.ford-trucks.com/forums/1...l#post11347861
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Cross-Country
Joined: Jan 2008
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I tried the self test. After I cycled the key on/off and hit off/defrost buttons and then auto nothing happened. It just displayed auto, ac, and the temp it was set to. I must be doing something wrong, but I tried it several times and had printed the instructions.
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